Checklists for software errors, setup, and tool workflows.

1. Reproduce

2. Isolate

3. Apply

4. Verify

Latest checklists

When Outlook says it cannot connect to the server, email stops syncing and you may see a “Disconn...

If you see 'connection refused' or 'service not running' when using Windows Search, the search se...

If your Windows 10 PC slows down, fans spin up, and Task Manager shows high CPU usage from 'Windo...

If you see a notification that the Windows Security service has stopped working, your antivirus o...

After a recent Windows update, you may see an error like 'windows defender' is not recogniz...

How to Fix Windows Update Stuck at 100%
You've waited for a Windows update to finish, but it's stuck at 100% for minutes or hours. This i...